Transmitting mechanism.



Nn. 709,265. Patented sept. I6; |902.4

C. W. HUNT. T'RANSMITTING MECHANISM. (Application led Nov. 30, V19.00.) (Nu Model.) 2 Sheet-Sheet l,

INVENTOR ATTORNEYS WITNESSES No. 709,265'. Patented sept. la, |902. c..4 w. HUNT. y

TRNSMITTING MEUHANISM.

(Application led. Nov. 30, 1900. (No Model.)

2 sheets-sheet 2,

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FFICE.

l CHARLES W. HUNT, OF WEST NEW BRIGHTON, NEW YORK.

TRANSlVllTTING IVIECHANISVI.

SPECIFICATION forming` partout" Letters Patent No. 709,265, dated September 16, 1902. application flied November so, 1900. semi No. 38,089. uro model.)

To all whom, it may concern:

Be it known that I, CHARLES W. HUNT, a citizen of the United States, residing in West New Brighton, borough of Richmond, city of NewYork, State of New York, have inventan improved power-transmitting device which shall be capable of regulation with exact-ness,

so that any desired speed can be given to the driven part, shall be controlled easily, and shall be simple in construction.

The invention will he more fully described hereinafter with reference to the accompanying drawings, in which for purposes of illustration and explanation the invention is represented as embodied in convenient and practical forms. 4

In said drawings, Figure lis a View in longitudinal central section of a power-transmitting device which embodies the invention. Fig. 2 isla transverse seclin of the same on an irregular plane. Fig. 3 is view similar to Fig. l, but showing a slightly-different embodiment of the invention. Figs. and 5 are detail views showing `different controlling devices.

In carrying the invention into practice any convenient form of pump is interposed. between the driving part and the driven part of the mechanism, one of the Working parts of the pump being connected to the driving part and the other of such working parts being connected to the driven part of the mechanism, and means are provided for controlling the circulation of iiuid through the pump, whereby more or less resistance is offered to the relative movement of such working parts.

`The pump thus becomes a rigid or a yielding connection between such driving and driven parts. It will `be obvious that any type of pump maybe employed.

In the mechanism represented in Figs. l and 2 the driver or driving member is sufficiently represented by the shaft a, a gear-wheel b being shown as applied thereto. The driven member, (represented by a shaft 0,) which is in line with shaft a, has secured thereto a closed shell d, which may have a bearing on the shaft a. A crank-arm e on the shaft a has connected therewith one or more pumps, preferably three, as shown. Each pump may be arranged in any convenient manner. As represented in the drawings, the cylinderfis connected `by a sleeve g with the crank-arm e, and the piston h, which cooperates with the cylinder, is connected by a pin or loose connection with the shell d. Each pump is adapted to pump air or water or any other fluid which may be placed within the shell d, and means are provided for controlling the flow of water or air or other duid from the pump, it being obvious that if the iiow is unrestricted the pumps will work freely and the crankshaft will rotate without causing the shell to rotate, while if the flow is restricted the pumps will workless freely or not at all and the shell will partake of the rotation of the crank-shaft, rotating with the same speed if the liow from the pump or pumps is cut off altogether. Any convenient means may be provided for regulating the flow from the pumps, and means which have been chosen for illustration will now be described. The end of each trunk-piston h is open, and the piston is provided with a valve t', which opens toward the crank-shaft. A outlet-polity` in the end of the piston at a certain point iu the travel of the pump is adapted to communicate, througha corresponding port formed in the crank-shaft, with a passage Z, which is formed in the crank-arm and communicates through a suitable port or opening fm, with the chamber within the shell d. The outow of the fluid from the pump-chamber is thereby regulated and will take place only when the portj registers with the corresponding port in the crank-shaft. A needle-valve n is disposed in the bore of the shaft a and may be controlled in any convenient manner for the purpose of varying the opening m, and thereby restricting more or less the tiow from the pumps. In the operation of this form ofi-the device it will be seen that if the opening m is open to the full extent, asindicated in Fig. l, the circulation of the fluid through the pumps will be unimpeded. The pumps will then work freely and there will be no tendency of the shell b to rotate. On the other hand, if the opening m is closed completely the flow IOO lshaft c.

through the pumps will be stopped, the pistons will ceaseto move with respect to the cylinders, and as the pumps then form rigid arms or connections from the shell to the crank-arm the shell will rotate wil h the crankshaft and at the same speed. If the opening m is partly opened, so that How from the pumps is permitted, although not freely, the shell will rotate, but at a slower speed than the crank-shaft.

In the arrangement shown in Fig. 3 the shell d is shown as the driver, being provided with a sprocket or other gear wheel d2 and having its bearings on two independent shafts c and c2, the device being adapted to be employed in this instance as a differential driving-gear, b v which the two shafts can be driven at dilferent speeds. The two shafts are provided with cranks c' and e2, respectively, the ends of the crank being brought back into line with the shafts and made to abut closely. Each crank is formed with a passage Z, with which the pumps communicate, (only one of each set being shown,) said pumps being connected with the cranks and with the shell, as already described with reference to Figs. l and 2. A lateral port m is formed in the end portion of one of the cranks e'and e? to permit the escape into the chamber formed by the shell h' of the fluid delivered by the pumps, and a sleeve r is fitted closely about the end portions of the cranks and is movable thereon to regulate the iow of fluid through the port m. It will be understood that any convenient means may be employed for regulating the flow through the port m', the sleeve 'r being shown merely for purposes of explanation. Such sleeve may be operated by a bent rod s, mounted within the shell and extended through a suitable stuffing-box in the shell, the outer end of such rod being connected to a lever t, mounted on the outside of the shell. The lever t also engages an annularly-grooved sleeve u on the The sleeve tt may be moved to and fro on the shaftbyaforked lever x. Anyother convenient means may be employed for operating the sleeve r or other device which controls the ow of fluid from the pumps. In the operation of the device applied as represented in Fig. 3 it will be obvious that if the circulation of the fluid is shut olf altogether the movement of both sets of pumps, those connected to the crank c and those connected to the crank c2, will be stopped,so that they willform rigid connections between the shell and both crank-shafts, whereby both crank-shafts will rotate together-and at the same speed as the shell d. If the circulation of the fiuid is not impeded at all, the pumps will work freely and the shell will rotate without causing either of the shafts to rotate. If the circulation of the fluid is restricted, the shafts will rotate at a slower speed than the shell, the two shafts rotating at the same speed or at different speeds, as the case may be. It will be observed that the device shown in Fig. 3 is particularly useful in the driving of motorvehicles, for if the driving-wheels of the vehicle are connected, respectively, to the shaft c' and c2 they will be permitted to rotate at different speeds when the vehicle is turning and will accommodate themselves to the circles of different radius then described by said wheels.

In the form of controlling mechanism shown in Fig. 4, which is adapted for the arrangement shown in Fig. 3, one of the crank-shafts c' is provided'with an axle-bore, which is an opening within the shell arranged to be controlled by aspindlc 91.',specifically as described with reference to Fig. l.

In the form of controlling mechanism shown in Fig. 5 the two crank-shafts c and c' are made relatively movable in longitudinal directions, so that the opening between them may be varied.

It will be obvious that the improved transmitting mechanism can be embodied in many different forms and that the invention is not to be restricted to the particular construc- `'tion and arrangement of parts shown and described herein.

I claim as my inventionl. In a device for transmitting power, the combination withadriving and adriven member, of a closed shell adapted for containing a fluid and connected to one of said members, a pump within said shell having its working parts connected respectively with said driving member and said driven member, said pump having inlet and outlet ports communicating with the interior of said shell whereby said shell may deliver fluid to and receive fluid from said pump, means in said outletport for regulating the flow, and means to control the rate of circulation of fluid through said pump.

2. In a device for transmitting power, the combination of a driving member, a driven member, a crank secured to one of said members, Ia closed shell adapted for containing a fluid and secured to the other of said members, a pump within said shell having one of its Working parts connected to said crank and the other of said working parts connected to said shell, said pump having inlet and outlet ports communicating with the interior of said shell whereby said shell may deliver fluid to and receive fluid from said pump, means in said outlet-port for regulating the Iiow, and means to control the rate of circulation of fluid through said pump.

This specification signed and witnessed this 24th day of November, A. D. 1900.

CHARLES W. HUNT.

In presence of- ANTHONY N. J EsBERA, LUcIUs E. VARNEY.

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